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Houzar S.,Mineralogicko petrograficke oddeleni | Cempirek J.,Mineralogicko petrograficke oddeleni | Cempirek J.,University of British Columbia | Toman J.,Mineralogicko petrograficke oddeleni | And 4 more authors.
Bulletin Mineralogicko-Petrologickeho Oddeleni Narodniho Muzea v Praze | Year: 2014

Tourmalinite occurrences at Kalvárie hill near Velké Žernoseky (northern Bohemia, Czech Republic) are represented by massive tourmaline-rich layers (with minor quartz <10 vol.%) in biotite-muscovite metapelites (phyllite to schist). Two tourmalinite assemblages were identified: a) almost monomineral tourmalinites to quartz-tourmaline rocks with accessory biotite, chlorite, fluorapatite, muscovite, calcite, and K-feldspar; b) tourmaline-epidote-quartz tourmalinites with minor garnet, muscovite and chlorite, and rare titanite, epidote and zircon. Garnet from the contact of the latter assemblage with the host rock (schist) exhibits an inverse zoning of Fe and Mn (Mn-rich core, Fe-rich rims). Four textural and compositional types of tourmaline containing variable contents of Fe3+, Fe2+, Ti, Ca, Na, and F were found. Other tourmalinite occurrences in the Oparno Crystalline Complex (Oparno-Černodolský mlýn, Chotiměř) are characterized by an increased amount of quartz, and typically form tourmaline-quartz veins in muscovite-biotite gneisses. Compared to the occurrence at Kalvárie hill, the tourmaline from Oparno has higher Mg, Al, and Ca contents and lower amounts of Na and OH. All rocks most likely formed by metamorphic overprint of boron-bearing protolite (biotite-muscovite metapelite with mafic admixture); however, the source of boron remain ambiguous. © 2014, National Museum Prague. All rights reserved.

Svobodova P.,Regionalni centrum pokrocilych technologii a materialu | Vitkova K.,Fakultni nemocnice Ostrava | Prochazka V.,Fakultni nemocnice Ostrava | Petr J.,Regionalni centrum pokrocilych technologii a materialu
Chemicke Listy | Year: 2012

Cell analysis is an important task in both analytical and medicinal chemistry. A pilot study of capillary electrophoresis analysis of adipose stem cells is presented. The optimum conditions for cell analysis were found in morpholinoethanesulfonic acid (MES)/NaOH buffer (pH 6.0) with an addition of NaCl. Capillary electrophoresis proved to be an effective tool in analysis of adipose stem cells. It could be also used for solving many other tasks in medicinal chemistry.

Melnikova L.,Ustav experimentalnej fyziky | Safarik I.,Oddeleni nanobiotechnologie | Pospiskova K.,Regionalni centrum pokrocilych technologii a materialu | Koralewski M.,Univerzita Adama Mickiewicza | And 2 more authors.
Chemicke Listy | Year: 2015

Magnetoferritin is a metalloprotein composed of a protein coat (apoferritin) surrounding the magnetic iron oxide nanoparticles. Physicochemical characterization of magnetic, structural and morphological properties, size distribution and stability of magnetoferritin have been extensively investigated. Magneto-optical properties of magnetic nanoparticles in magnetoferritin can be applied in in vivo diagnosis of various diseases associated with the formation of magnetite in pathological processes in tissues. In addition, the confirmed peroxidase activity enables magnetoferritin to be used in important bioapplications. © Petr Zámostný.

Papousek R.,Regionalni centrum pokrocilych technologii a materialu | Novakova P.,Regionalni centrum pokrocilych technologii a materialu | Markova E.,Regionalni centrum pokrocilych technologii a materialu | Bartak P.,Regionalni centrum pokrocilych technologii a materialu
Chemicke Listy | Year: 2013

The study deals with the GC-MS determination of acrylamide in various matrices. The proposed method involves bromination of acrylamide to 2,3-dibromopropanamide, its conversion to 2-bromopropenamide and the GC-MS determination. The method was used for the determination of acrylamide in water, gaseous products of combustion and in food such as potato chips and cookies. The measured concentrations of acrylamide ranged from 46 to 1980 μg kg-1 the highest levels being found in ground coffee and tobacco smoke.

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